New UC Irvine-led research finds that a father's health before and during parenthood, including obesity, diet, stress and mental health, can influence a child's long-term risk of obesity and related diseases.

Evidence suggests paternal obesity can affect sperm health and biological markers linked to children's metabolism, appetite regulation and disease risk, but some of these changes may be reversible through weight-loss interventions.

Researchers say obesity prevention efforts should more intentionally include fathers through father-friendly health care, mental health support and workplace policies that help parents build healthier family environments.

Nageatte Ibrahim, M.D., an internationally recognized oncology drug development leader and immuno-oncology expert, has been appointed as Research Director of Developmental Therapeutics and Immuno-Oncology for HonorHealth Research Institute.

Researchers from Brown University’s School of Public Health found that gun owners may be able to minimize children’s exposure to lead, an environmental toxin, by safely storing their firearms and ammunition. The findings were published in the Journal of Exposure Science and Environmental Epidemiology.

A new study published in the Journal of Health and Social Behavior shows that when immigrants have adopted some cultural and behavioural elements of their home country but not others, they have worse health.

The rise in remote work caused by the COVID-19 pandemic has substantially increased time spent alone and worsened workers’ mental health, according to a new study based on survey data from more than 500,000 Americans. In evaluating remote employees’ mental health, the analysis moves beyond the main consequence of remote work more typically evaluated in studies to date: worker productivity. The study’s results suggest that “the shift in work location to the home carries measurable costs at the population level,” Emma Zhang and Rourke O’Brien write in a related Perspective. After the pandemic led to many people working from home, the results of studies evaluating the mental health impacts on employees were mixed. To understand remote work’s effect on human well-being better, Natalia Emanuel and colleagues analyzed data from five nationally representative US-based surveys that together spanned more than a decade and included 568,000 respondents. They compared workers’ experiences before the pandemic (2011 to 2019) with experiences from the post-peak period (2022 to 2024), excluding the acute pandemic years of 2020 to 2021. The authors found that workers in jobs amenable to remote work experienced substantially larger post-pandemic increases in time spent alone, worsened mental well-being across multiple measures, and increases in the use of mental health services and prescriptions. These effects were particularly pronounced among individuals living alone. Noting a limitation of their study, the authors said, “Given that our data end in 2024, we cannot fully capture long- term adaptations among remotable workers.” If workers made changes, such as cultivating social networks outside of work, they may not yet have reaped the full benefits by the time of the study, they added. “Across a range of remote work arrangements, both individuals and organizations may want to prioritize making remote work less isolating by, for example, coordinating in-office days for hybrid workers or encouraging informal interaction, even online,” Emanuel et al. conclude.

Data is available for the creation of data visualization images. For more information, please contact Natalia Emanuel at natalia@nataliaemanuel.com

Though several randomized controlled trials have investigated the effects of ultraprocessed foods (UPF) on obesity, leading to news coverage that suggests ultraprocessing is inherently harmful, the reality is different, according to the authors of this Perspective. Based on the design of clinical trials conducted to date, it is very difficult to attribute negative effects observed in trial participants to ultraprocessing. Instead, these effects are likely due to differences in traditional nutritional properties that UPFs frequently exhibit – including soft textures (which can lead people to eat more and faster), high calorie density, high amounts of saturated fat and salt, and low fiber and protein content. These properties affect health regardless of the extent of food processing, Faidon Magkos and colleagues say. The authors describe the five clinical trials conducted so far on UPFs in the USA, UK, Denmark, and Japan, outlining the trials’ methods, variable findings, and limitations. “Collectively, available randomized controlled trials provide weak support for an ultraprocessing-specific effect of UPFs on body weight regulation and cardiometabolic function that is independent of established nutritional determinants,” Magkos et al. write. They note that the UPF concept encompasses many foods that are unhealthy, but also foods that are not necessarily harmful and even some that are beneficial. Based on evidence from the trials, they recommend that policy guidance around UPFs should focus on distinguishing nutritionally poor, calorie-dense, and rapidly consumed foods – regardless of their degree of processing.

Podcast: A segment of Science's weekly podcast with Faidon Magkos, related to this research, will be available on the Science.org podcast landing page after the embargo lifts. Reporters are free to make use of the segments for broadcast purposes and/or quote from them – with appropriate attribution (i.e., cite "Science podcast"). Please note that the file itself should not be posted to any other Web site.

Fewer than one in five adults older than 65 report discussing their cannabis use with clinicians, according to Rutgers Health researchers.

Their study, published online ahead of print in the August 2026 issue of the American Journal of Preventive Medicine, explored the prevalence of conversations between patients and clinicians about cannabis use and its potential harms.